1-640442-0 is an MTA-100 IDC (Insulation Displacement Contact) connector housing designed for closed-end or feed-thru configurations in printed circuit board applications. This connector is part of the MTA series and supports multiple circuit positions ranging from 2 to 28 positions, with wire sizes accommodating 0.2–0.4 mm² (22 AWG) conductors. The housing is constructed from standard UL94V-2 material with tin plating for reliable electrical contact and corrosion resistance. The connector features a modular design with optional polarizing tabs and locking mechanisms to ensure secure mating and prevent accidental disconnection. Common applications include mass termination in telecommunications, industrial control systems, and computer peripheral connections where reliable, cost-effective interconnection is required.